Charles scott



.(No Model.) u C; SCOTT.

GONPINING BAND FOR SPRINGS. No. 598,894. Patented Feb. l, 1898.

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`CHARLES SCOTT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO CHARLES SCOTT SPRING COMPANY, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 598,394, dated February 1, 1898.

Application filed July 14, 1897.

T0 LZZ whom it may concern.:

Be it known that I, CHARLES Scorr, a citi- Zen of the United States, residingin Philadelphia,Pennsylvania,have invented certain Improvements in ConfLning-Bands for Springs, of which the following is a specification.

This invention relates to elliptical or halfelliptical laminated springs in Which the leaves or plates of the spring are tightly confined at the center by means of a clampingband pressed upon the same; and it consists of a provision whereby the leaves of the spring may have freer movement than usual and whereby greater and more uniform flexibility is effected, With decreased strain upon the spring under deilection, the liability of the leaves of the spring to break under strain being greatly lessened.

The invention consists in forming the clamping-band with a ribbed internal surface, whereby, although the band may retain the general strength and external shape of clamping-bands noW in use, the internal 4bindingsurface in contact With the leaves of the spring is of considerably less Width than the Width of the band, the confined area of the springleaves being, in fact, so limited that said leaves are permitted to deflect uniformly throughout their entire length.

In the accompanying drawings I have illustrated my invention as applied to a semi-elliptical spring, Figure 1 representing a side View of the spring With the improved band applied thereto. Fig. 2 is a vieW representing the under side of the spring and its confining-band. Fig. 3 is a sectional plan view on,

the line x, Fig. 1. Fig. 4 is a transverse section of the band on the line y y, Fig. 2, showing portions of the spring-leaves in elevation; Fig. 5, a similar View showing the leaves as they appear' When subjected to eX- treme strain; Fig. 6, a transverse section on the line w w, Fig. l; Figs. 7, 8, and 9, views illustrating various formsrof spring-band embodying my invention; and Figs. 10 and l1 views illustrating the construction of and the objection to the ordinary form of clampingband of the character to which my invention relates. Figs. 3 to 11, inclusive, are on a larger scale than Figs. l and 2.

In the manufacture of elliptical or semi- Serial No. 644,561. (No model.)

elliptical springs it has been customary herelows the curvature of the leaves of the spring, l.

as shown in Fig. l0 of the drawings. lhen the spring Vis deflected, therefore, the effect is that shown in Fig. 1l, the portions of the leaves Within the band being held perfectly rigid and retaining their original curvature,` While those portions of the leaves outside of the band are deflected, thus forming a bend in each leaf at the edges of the band and causing great strain at these points, Which results in frequent breakage. My improvement has been especially designed to overcome this defect, and said improvement consists, essentially, in providing the band with a ribbed internal surface, the rib being of considerably less Width than the band, so that While the said band contains the amount of material necessary for the desired strength and retains the external shape and dimensions of the ordinary band, so as to lit it to the ordinary spring attachments of cars, locomotives, or other vehicles, the internal clamping-surface of the band is much reduced and ea'ch leaf of the spring is free to be deflected throughout its entire length, as Will be understood on referenceto Figs. i and 5.

The internal ribbed surface of the band may be variously formed in accordance with my invention. Thus in Figs. 1 to 6 the rectangular band l has a central internal rib 2* extending around all four sides of the band, the rib being of uniform Width throughout and serving to confine only alimited portion of the center of each leaf of the spring.

In Figs. 7 and 8 multiple ribs are shown in place of a single rib, the rib 2b (shown in Fig. 7) being double and the rib 2c (shown inFig. 8) being triple, and in some cases this form of multiple rib is to be preferred, the inner or bearing surface of each rib being either flat, as shown in Fig. 8, or rounded, as shown in Fig. 7.

While it is preferable to extend the internal IOO rib completely around the internal surface of the band, a rib extending along but two adjoining sides of the band may, if desired7 be used, as shown, for instance, at 2d in Fig. 9, no material pressure being exerted upon the leaves 0f the spring throughout any portion of the opposing sides of the band except those directly opposite the rib, so that the leaves Will have substantially the same freedom of movement as though the rib extended completely around the band.

Having thus described my invention, I elairn and desire to secure by Letters Patent- 1. A leaf-spring consisting of a series of leaves or plates conlined together bya clamping-band ribbed internally on adjoining sides, the rib being of less Width than the band whereby the leaves or plates of the spring are confined throughout a less area than that of zo the band.

2. A leaf-spring consisting of a series of leaves or plates, con fined together by a clamping-band having an internally-projecting rib extending around the four sides of the band 2 5 and of less Width than the band.

3. A leaf-spring consisting of a series of leaves or plates confined together bya clamping-band having on adjoining sides a rib of uniform Width throughout and less in Width 3o 

